On Wed, Sep 23, 2015 at 05:21:00PM -0600, John Nielsen wrote: > On Sep 23, 2015, at 3:25 PM, Edward Tomasz Napierala <tr...@freebsd.org> > wrote: > > > On 0923T0916, John Nielsen wrote: > >> On Sep 23, 2015, at 2:12 AM, Yonas Yanfa <yo...@fizk.net> wrote: > >> > >>> isboot is a iSCSI boot driver written by Daisuke Aoyama that allows you > >>> to boot your root partition using iSCSI. > >> [,,,] > >>> This was first announced way back in June, 2010: > >>> > >>> https://lists.freebsd.org/pipermail/freebsd-scsi/2010-June/004425.html > >>> > >>> I've tested the current version (v0.2.10) and it works with FreeBSD 10.2 > >>> booting a ZFS on root installation: > >>> > >>> http://www.peach.ne.jp/archives/isboot/isboot-0.2.10.tar.gz > >>> > >>> I've used iSCSI boot with Ubuntu Server for a while and it's been very > >>> useful. I'm looking forward to FreeBSD having the same capability > >>> built-in. > >> > >> +1. I have used this module in the past and it is extremely useful. Thanks > >> for the pointer, I wasn't aware it had been updated for FreeBSD 10.x so > >> recently. I've also wondered why this is not part of FreeBSD by default. > >> > >> Aoyama-san, do you have any objection to this code being included in > >> FreeBSD? If not, can you formally assign it a BSD or other friendly > >> license? Thank you again for the work! > >> > >> Trasz (or anyone), is there other work to support iSCSI booting and/or > >> IBFT on FreeBSD? Anything else isboot might conflict with? Any problems > >> with integrating the code or with the code itself? > > > > The basic problem with isboot is that it only works with the old iSCSI > > initiator, which is now marked obsolete. AFAIK there is no ready solution > > that works with the new one - however, it should be possible to use upcoming > > reroot support to achieve this: boot with a temporary rootfs, mounted from > > a ramdisk preloaded by loader(8), setup an iSCSI session, and then replace > > the temporary rootfs with the real one, mounted over iSCSI. > > Ah, thank you for clarifying. I forgot that 10.x still supports the old > initiator. > > The reroot approach sounds interesting but less straightforward. The beauty > of isboot is that the kernel-loaded from a normal root disk that happens to > be iSCSI-connected-knows how to re-establish its network and iSCSI > connections just from the information in the iSCSI Boot Firmware Table, i.e. > native iSCSI booting. I'd love to see the same approach continued with the > new initiator. I suspect that a new implementation could re-use all of the > IBFT code and most of the networking code, but I don't know how hard the > remaining pieces would be. I may have a chance to look in to it but a kernel > programmer I am not, sadly. > > I think a "native" iSCSI reroot approach could be feasible at some > point; for me that would mean that the loader could load the kernel > and a standard-ish (or easily auto-generated) mfsroot from the iSCSI > volume seamlessly, then something in the mfsroot parses the IBFT and > sets up the network and iSCSI connections before switching root.
mfsroot auto-generated by loader? cool for stay in sync mfsroot with main tree. _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
